small fix in api

static/js/api.js

@@ -42,15 +42,16 @@ function cacheHeaderSummary(headers) {
 
 async function readBodyAuto(response) {
   const ct = (response.headers.get('content-type') || '').toLowerCase();
+  const raw = await response.text();
   const isJson = ct.includes('application/json');
   if (isJson) {
     try {
-      return { kind: 'json', data: await response.json(), contentType: ct };
+      return { kind: 'json', data: JSON.parse(raw), contentType: ct, raw };
     } catch {
-      return { kind: 'text', data: await response.text(), contentType: ct };
+      return { kind: 'text', data: raw, contentType: ct, raw };
     }
   }
-  return { kind: 'text', data: await response.text(), contentType: ct };
+  return { kind: 'text', data: raw, contentType: ct, raw };
 }
 
 function safeParseJsonFromTextarea(textareaId) {
@@ -255,7 +256,7 @@ function downloadFromApiJsonTextarea(endpoint, textareaId, fileBaseName) {
   const url = baseUrl + '/api/' + endpoint;
 
   fetchAsBlob(url, 'POST', body)
-    .then(async ({ blob, headersText, cacheSummary, contentType, contentDisposition }) => {
+    .then(async ({ blob, headersText, cacheSummary, contentType }) => {
       const ext = guessExtensionFromContentType(contentType);
       const filename = `${fileBaseName}.${ext}`;
 
@@ -278,7 +279,6 @@ function downloadFromApiJsonTextarea(endpoint, textareaId, fileBaseName) {
     });
 }
 
-
 function previewTextFromGenerate(textareaId) {
   const { body: out } = showResponse('response-generate-download');
 
@@ -291,7 +291,7 @@ function previewTextFromGenerate(textareaId) {
   }
 
   fetchAsBlob(baseUrl + '/api/generate', 'POST', body)
-    .then(async ({ blob, headersText, cacheSummary, contentType }) => {
+    .then(async ({ blob, headersText, cacheSummary }) => {
       let text = '';
       try { text = await blob.text(); } catch { text = '(binary content)'; }